I recently took a hike in the Ramapo Reservation without a map, and had a less fun time than I hoped for. The natural surroundings were great, but there are many trails, and I could not find what I was looking for.
To the rescue - trail maps by the NY-NJ Trail Conference. Great color and BW maps printed on Tyvek, so they won't rip. NYNJTC does great work for hikers in the area of New York City. Buy their stuff.
(A shoutout of thanks to Danny Chazin, who has worked tirelessly for TC, the Scouts, and his synagogue over the years.)